add interception tools and caps2esc

Existing users who use xmodmap to rebind caps lock as control in X will
probably want to disable xmodmap first.

roles/interception/handlers/main.yml

@@ -0,0 +1,5 @@
+---
+- name: restart udevmon
+  service:
+    name: udevmon.service
+    state: restarted

roles/interception/tasks/main.yml

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+---
+- name: Install caps2esc
+  pacman:
+    name: interception-caps2esc
+    state: present
+
+- name: Push caps2esc udevmon config
+  template:
+    src: caps2esc.yaml.j2
+    dest: /etc/interception/udevmon.d/caps2esc.yaml
+  notify:
+    - restart udevmon
+  when: interception.caps2esc.enabled is defined and interception.caps2esc.enabled == True
+
+- name: Enable and start udevmon
+  service:
+    name: udevmon.service
+    enabled: yes
+    state: started
+  when: interception.caps2esc.enabled is defined and interception.caps2esc.enabled == True

roles/interception/templates/caps2esc.yaml.j2

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+- JOB: "intercept -g $DEVNODE | caps2esc -m {{ interception.caps2esc.mode }} -t {{ interception.caps2esc.delay }} | uinput -d $DEVNODE"
+  DEVICE:
+    EVENTS:
+      EV_KEY: [KEY_CAPSLOCK, KEY_ESC]